Foot press



ATTEY INVENTQQ JENSEN FOOT PRESS Jan. 10, 1933.

Filed June 29. 1931 Patented Jan. 10, 1933 UNITED stares PATENT f OFFICEJOHN JENSEN, OF ROCKFORD, ILLNOIS', ASSIGNOR 'IO` WHITNEY METAL 1LLINOIS,'A CORPORATION OF ILLINOIS COMPANY, OF ROCKFORD,

Toon

FOOT PRESS Application led .Tune 29,

The invention pertains to a tool or punch press for use in performing,shaping or forming, and allied operations, and especially adapted foroperation by a foot lever.

5 The object of the invention is to provide a tool of the character setforth, which is simple in construction so as to be capable of economcalmanufacture, easily operable, and adapted for accurate manipulation.

A preferred embodiment of the invention is illustrated in theaccompanying drawing forming part hereof, in which:

Figure l is a fragmentary, vertical sectional view through the improvedpress, certain of the parts being shown in elevation.

Fig. 2 is an end view looking from the right in Fig. 1.

The tool comprises, as herein shown, a frame having a base plate 7 fromthe rear 2o portion of which rises a standard 8 carrying an overhangingarm 9, the several parts of the frame being preferably cast integral.`The base plate 7 is in the present embodiment adapted to be mounted upona bench or table 25 top 10 having a slot 11 therein through which aportion 12 of the frame depends.

In the forward end of the overhanging arm 9 is mounted a movabletool-carrying slide in the form of a block 13. The latter is sovertically slidable between opposed portions 14 of the frame providingsuitable guideways. At its lower end the slide 13 is suitablyconstructed to receive and hold a desired tool (not shown) according tothe purpose f for which the press is to be used.

Extending generally in a front to rear direction relative to theover-hanging arm 9 is an operating lever 14 fulcrumed at its forward endon a pivot pin 15 mounted in op posed walls of the arm 9, the latterbeing made hollow at its forward end for the purpose of receiving andenclosing the lever. The pivot pin 15 is located closely adjacent thetool slide 13, and the forward end of the lever passes through anopening 16 in the forward end of the arm and into a slot 17 in the toolslide. The upper and lower edges of the forward end 'portion of thelever are rounded and engage with the tool slide through the medium ofupper and lower wear plates 18 1931. Serial No. 547,586.

which are removably secured in vplace by means of a front plate 19. Thelatter as here; in shown is secured in position bymeans of a screw 20entered through a slot 21 in the upper end of the plate and anchoredy inthe slide. The lower end of the plate is notched to receive a retainingscrew 22.

The lever 14 is made of substantiallength so that its rear end projectsfrom the rear end of the arm 19 for pivotal connection with the upperend of a link 23. rEhe lower end of said link 23 is pivotally connectedthrough the medium of a.v pivot p'n 24 with the upper end of a secondlink 25, which in. turn is mounted on a pivot pin 26 carried by theupper end of a support 2T.y Thelatter isp-referably in the form of ascrew capable of'being raised or lowered by means of a threaded collar28 bearing on top of the rear end of the frame. By means of theadjustable pivot pin 26, the range of movement of the tool slide 13 maybek varfed. Primaril however, the variable support aords a means for adejusting the links 23 and 25 to assume any desired position when the toolslide 13 is at the end of its downward stroke as determined by theoperation to be performed on any particular work piece. A set screw 29serves to fastenthe screw in the base.

It will be observed that the links 23 and constitute a toggle linkageoperable between the base plate 7 and the rear end of the lever 14. Foractuation of such linkage I employ an upright lever 30 of substantiallength, fulcrumed in the depending porti-on 12 of the frame on apivotpin 31 and hav'- ing .its upper end pivota-lly connected by means of alink 32, with the pivot pn 2,4 constituting the intermediate pivot ofthetoggle. The lower end of the lever 3()v is constructed so as to beconveniently operable by the foot of an operator positioned forwardly ofthe tool. Herein I have shown for this purpose a transverse foot bar 33.

While the screw 27 is capable of adjustment to vary the range ofmovement of the tool slide, the various pivotal connections between thisscrew and the slide render this form of adjustment unreliable as anaccurate means for limiting the downward travel of j i Y 1,893,705

the slide. I therefore have provided an adjustable stop in the form of ascrew 34 mounted in the overhanging arm 9 in position to be engaged bythe upper edge of the lever 14 at the end of a predetermined downwardmovement of the slide. The screw 34 is equipped with a lock nut 35 sothat it may be held positively in set position. Such limiting of thedownward movement of the tool slide is especiallv important where thepress is employed in performing certain shaping or forming operations.lVith the downward movement of the tool slide thus limited by theadjustable stop, the desirability of an adjustable pivot pin 26,adapting the links of the toggle means to be adjusted in accordance withthe so modified range or" movement, becomes apparent.

For coaction with a tool carried by a slide 2i). 13, an auxiliary toolor die (not shown) may be mounted in a hole 86 provided in the forwardend of the base plate 7 beneath the tool, slide 13.

It will be observed that the construction provided is ot' a simplecharacter so that the press may be manufactured economically that b vthe use ot' the toggle linkage in combination with the levers 14 and 30,operations requiring a powerful movement of the forming or punching toolmay be accomplished with comparative ease; and that where accuracy isrequired by the nature or" the work being done, the extent of movementof the slide during its operating stroke may be definitely andaccurately defined.

I claim as my invention:

A tool of the character set forth, comprising, in combination, a framehaving a horir zontally Vdisposed arm, a tool slide mounted 40 for upand down movement at the forward end of said arm, a lever operativelyengaging. said slide and disposed approximately at right angles to thepath of movement thereof, said lever having a fulcrum adjacent the endengaging said slide, a toggle linkage having one end connected to theremaining end of said lever and the other end adjustably supported insaid iframe, a substantially vertical lever fulcrumed on said frame and5U. having a link connection with the intermediate pivot of said togglelinkage to actuate said first mentioned lever, and an adjustable stoppositioned to be engaged by said first mentioned lever to limit thedownward movef ment of said tool slide. I

In testimony whereof, I have hereunto affixed my signature.

JOHN JENSEN.

